Vehicle-brake.



N. R. DOROHQN. VEHICLE BRAKE.

APPLICATION FILED MAR. 20, [945.

: lafented 0015.212, 1918,

2 SHEETS-SHEET 1.

INVENTOR.

N. B. DOROHUN. VEHICLE "B PIAKE. APPUCATIONY HLTED AR. 20, 1918.

f lafiented Oct. 22, 1918.

gSHEETS-rSHEET 2.

\ Mix WITH ESS UNITED STATES PATENT GFFICE.

-NATHAN R. DOROHON, OF MCKEESPORT, PENNSYLVANIA.

VEHICLE-BRAKE.

Application filed March 20, 1918.

To all whom it may concern Be it known that I, NATHAN R. DoRoHoN, a citizen of the United States, residing at McKeesport; in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Vehicle-Brakes, of which the following is a specification.

This invention relates to vehicle brakes and more particularly that class of brakes used upon automobiles which serves both as a brake and skid preventing medium, and has for its principal objects; the provision of abraking mechanism that may be instantly applied when the emergency arises, to effect the quick stop of an automobile or prevent skidding upon slippery road surfaces; the provision of a brake mechanism that is so supported that the shock of a quick stop is readily absorbed; the provision of a brake mechanism that is both eflicient and durable, and such other objects as will hereinafter appear. One embodiment of the invention is illustrated in the accompanying drawings, wherein- Figure 1 is a plan view of the apparatus; Fig. 2 is an enlarged plan view of a portion of certain details of the mechanism; Fig. 3 is a side elevation of the device shown in Fig. 1; and Fig. 4 is a side elevation showing the parts in operative position.

Referring to the drawings, wherein the chassis of an automobile ,is shown as supporting the mechanism, the braking apparatus consists of a pair of brake shoes 1 provided on itslower face with serrations or teeth 2 adapted to frictionally engage the surface of the road 3 when the shoe is lowered into contact with the road. The shoes are attached to the frame members 4 of the automobile and held against longitudinal movement when in operative position, by means of the tension links 5 which are pivoted at their lower ends by the pivot pin 6 to the front ends of the shoes 1. The upper end of the tension links 5 are pivoted to a cross-head 7 which is provided with forwardly extending guide shoes 8 adapted to slide in the guides formed by the flanges 9 of the channel shaped frame members 4.

The cross-head 7 is normally yieldingly held in its forward position shown in the figures by means of compression springs 10 Specification of Letters Patent.

Patented oet. 22, 1918.

Serial No. 223,623.

which are disposed between the cross-head 17 and a cross-channel ll connecting the frame members 4. It will be seen from the foregoing that the shoes 1 are yieldingly attached to the frame members 4 so that when the shoe comes in contact with the surface of the road the shock incident to such contact will be absorbed by the springs 10.

The rear ends of the shoes 1 are supported by means of a pair of suspension links 12 which are pivoted by means of a pin 13 to the shoes 1 and at their upper ends are pivoted to a cross-head 14 having guide shoes 15 secured to the ends thereof, which shoes are adapted to slide in the guide formed by the flanges 9 of the frame members 4. The cross-heads are retained in their rear or retracted position by means of a pair of helical tension springs 16 secured at one end to the cross-head 14 and at the other end to the rear cross member 17 connecting the frame members 4.

-lVhen the springs 16 and 10 are in their normal position, the brake shoes 1 will be suspended beneath the frame of the automobile in the position indicated in 3. The brake shoe is adapted to be moved into operative position, as indicated in Fig. 4, by means of a set of toggle links 18 and 19, which are pivoted together by a shaft 20, the upper end of the links 18 being secured to a rocking shaft 21 which is pivoted between the frame members 4. The lower end of the toggle link 19 is pivoted adjacent the center of the brake shoe 1 by means of a pivot rod 22 passing through the upper portion of the brake shoe 1. By referring to Fig. 1, it will be seen that each brake shoe 1- is supported by a pair of the toggle links 18 and 19, the toggles being spaced apart so as to make a rigid construction that will resist any force tending to displace them laterally or in a direction transverse to the axis of the automobile.

The entire brake shoe structure is strengthened and supported against transverse lateral displacement by means of diagonal braces 12' and 18, the former, extending downward from the center of the crosshead 14 to a point 12" where the braces are joined to the suspension rods 12, and the latter extending downward from the'center of the rocking shaft to the shafts 20 of the toggle members. See Fig. 1. The brake shoes the toggle members tion by means of a latch mechanism 28 carby means a from one shoe ivot connection for are connected directly verse rod 22 el -tending oth r and serving a 19. The toggle links 18 and 19 are adapted to i o is 1 a e orce the 1a c sioe covv are c sul acu othe road vvhen'the shaft 20 is drawn toward 2,! w k E 43. 21 i YD 1. toe roci ing s iait i, and L -is inovcnicnc is accomplished by means of connecting rods 23 pivoted at one end to the shaft 20 of each pair of toggle members and at the other end to rocking levers 2% which are secured to an operating shaft 25 carried upon the frame members l by means of brackets 26. brake lever :27 is secured adjacent one end of the operating shaft 25 is adapted to be locked in operative and inoperative posiried upon the handle 27. The latch is adapted to seat in notches 29 and 3% cut in the outer face of a sector 81 secured the automobile in any suitable manner.

:W hen the springs 16 have retracted the crosshead 1 so as to draw the brake shoes 1 into raised position, indicated in 3 the brake lever 2'? will occupy the forward position indicated in When it is desired to lower the hr into contact with the road la is first pressed toward the handle of he lever I? so as to Withdraw it from notcl- 30 after ivhich operation the lever 27' is drawn rearvvardly so as to straighten out the toggle members and thereby force shoe 1 downward against the tension of the springs it. ii hen the lever 2? is position indicated in Fig. 4, the latch 28 Will enter he notch 29 and hold it in braking posit The instant brake lever 3'" is released the sion springs 16 will retract the cross-head 1% thereby drawin the brake shoe again into the position indicated in Fig. 3. it is desirable, however, to releasably latch the brake shoe in this'position therei re a pair of latch hooks 32 pivoted for limit-e l rotary movement with respect to the reciring shaft 21 upon the said shalt, these hoolrs sing provided at their lower ends with a turned-up hook receive and retain hoolrs 34 rigidly carried upon brake sho s 3., a

ll Jrring to 2 Will be seen that latch hoolrs 32 are provided with an eaten-l sion 35 adapted to engage a pin 36 mounted upon he reciting shat 21' These latch hooks 32 are mounted adja eat the linlrs 18 carried by the shaft 21 and the latch lioolrs 32 are normally held in a predeterrained position with respect to the reciting shaft 21 by means prings 37 coiled about shaft 21 so Jtached to the "toggle links and the hooks 32 tensions 35 carried the latch hoolrs 32 the stop sins 38 vv when the latch hook 3e, rigidly secured to the brake shoe 1, en ages the under curved end of the hook 33, the latch book 32 Will be moved thereby toward the left or clockwise until the ends of the hooks pass each other. The hooks are automatically detached rroin one another when the connecting rod 23 is moved to the left.

l't is desirable to disengage the driving clutch at the same time the emergency brakes are applied and for this purpose a clutch rod 8 is pivoted to the rocking lever 39 secured to the operating shaft 25 so that when the brake lever 2'? is pulled to the left the clutch rod 38 Will be moved toward the right. The free end of the clutch rod is provided with an elongated slot 39 through which a pin 40, carried by the clutch pedal a l, extends, so as to be operatively engaged by the clutch rod 88. @peration of the brake lever 5 to force the brake shoes 1 into engagement with the surface of the rod will at the same time actuate the clutch pedal 1-1 so as to move the clutch into disengaging position. The details of the clutch mechanism are not shown but the clutch is indicated in dotted lines at 42 and may be of any preferred form of construction that is adapted to be operated by a foot pedal.

As a means of indicating the relative position of the parts of the apparatus with respect to the parts of any standard automobile, the engine 48, the clutch 42, the gear box the driving shaft 45, and the differential gear case 46 are all indicated in broken lines, and it Will be seen the braking apparatus is so positioned that it in no manner interferes with the present automobile stanoard equipment. While i rarne meinbers, channel shaped in cross-section, here shown in the drawings, it obvious that other forn'is oi frame members may be used in which case special guides may be secured to the frames for supporting the cross-heads Li and '7. It is obvious that many other changes may be made in the details of the construction without departing from the spirit of he invention and invention is not lir. ed to the specific structures herein shown and described.

clairr is:

l. A braking mechanism for automobiles, cor rising in combination a "trains a brains s-. oe adapted to be lowered into contact with surface of the road, actuable means for the shoe into contact with the l a r retracting the shoe road, nd means i comprising snbsta ally horizontal guides channeled in said irarne, a cross-head slidy I mounted guides yielding means lZlll holding the cross-head in retracted an a linlr connecting the cross the slice whereby the shoe is no a upwardly by the yield c movable forvvarchy 'J i rose-need in the guideswhen the lowering means is actuated,

2. A braking mechanism for automobiles, comprising in combination a frame, a brake shoe adapted to be lowered into contact with. the surface of the road, actuable means for lowering the shoe into contact with the road, and means for retracting the shoe comprising a substantially horizontal guide formed in and constituting a part of said frame, a cross-head slidable forwardly in the guide when the lowering means is actuated, a spring normally holding the cross head in retracted position, and a link pivotally connecting the cross-head with the shoe whereby the shoe is normally drawn upwardly by the spring.

3. A brakingmechanism for automobiles, comprising in combination a frame, a brake shoe adapted to be lowered into contact with the surface of the road, 'a link connecting said shoe to the frame, means for lowering the shoe into contact with the road, and means for retracting the' shoe comprising a substantially horizontal guide formed in said frame, a cross-head slidable forwardly in the guide, a spring normally holding the cross-head in retracted position, and a link pivotally connecting the cross-head with the shoe.

4:. A braking mechanism for automobiles, comprising in combination a frame, a brake shoe adapted to be lowered into contact with the surface of the road, a link connecting said shoe to the frame, a shaft in said frame above said shoe, means on said shaft for lowering the shoe into contactwith the road, and means for retracting the shoe comprising a substantially horizontal guide forn1 ing'part of the frame, a cross-head slidable forwardly in the guide, yielding means normally holding the cross head in retracted position, a link connecting the cross-head with the shoe whereby the shoe is normally drawn upwardly by the yielding means, and

bracing means for said shoe mounted on said shaft.

5. The combination with an automobile frame formed of spaced parallel channel shaped frame members, of a cross-head adapted to be supported inthe channels of the frame for longitudinal movement, and a brake shoe for engaging the surface of the road adapted to be retracted by movement of the cross-head with respect to the frame members.

6. The combination with an automobile frame formed of spaced parallel channel shaped frame members, of a cross-head adapted to be supported in the channels of the frame for longitudinal movement, a brake shoe for engaging the surface of the road adapted to be retracted by movement of the cross-head with respect to the frame, and a spring secured to the frame and the cross-head for retracting the cross-head:

7. The combination with an automobile frame formed of spaced parallel channel members, of a pair of cross-heads adapted to be slidably supported in the channels, and yieldingly held in a predetermined position with respect to the frame members, a brake shoe for engaging the surface of the road, links connecting the cross-heads. with the shoe, and means for moving the shoe into contact with the road.

8. The combination with an automobile frame comprising spaced parallel frame members channeled to form guides, of a pair of arallel cross-heads slidably supported at t eir ends in said guides, and yieldingly held in a predetermined. position with respect to said members, a brake shoe, disengageable cooperating latch members on said shoe and said frame, tension and suspension lihks connecting the cross-heads with the shoe, and means for moving the shoe into contact with the road upon disengagement of said latch members.

NATHAN R. DOROHON. 

